RE: [IMail Forum] SMTP Rejections - NDR Mailbox

[Travis Rabe]

Remove the nobody alias in Imail.  That will stop the bogus addresses email from  coming through.  OR change the destination of the nobody alias to re-direct it.   Regards,   Travis   -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]On Behalf Of Forums Sent: Wednesday, July 07, 2004 4:30 PM To: [EMAIL PROTECTED] Subject: [IMail Forum] SMTP Rejections - NDR Mailbox   Hi folks,   I am a relative novice with Imail Server.  (More an Exchange guy)  We inherited a number of Imail Servers when we acquired another company recently.    We now have the servers behind our Barracuda spam/virus firewall.  We noticed that bogus SMTP email addresses such as [EMAIL PROTECTED] or [EMAIL PROTECTED] are coming through.  The Barracuda eventually learns that these are spam and stops them.  The messages are funneled into a particular user account for each domain.   In Exchange, a message with an incorrect SMTP address to one of my users would be accepted and would immediately generate a non-delivery report (NDR) to the sender with an SMTP status code that essentially said "bad destination mailbox address".  These messages would be funneled to an NDR mailbox for later review by an administrator.   I would like to do one of two things in order of preference:   Have Imail reject all mail that is destined for a non-existent user. ie, Imail verifies the SMTP address exists before accepting the message. (I'd call this 'SMTP Rejections' or something similar) (This is what Barracuda Networks recommends)  Have Imail send an NDR of some sort.  Currently it does not send an NDR.   OR   Change the mailbox that accepts messages with incorrect/non-existent SMTP addresses (i.e. change the NDR mailbox).  Unfortunately these messages are currently going to an admin or secretary for each domain who is being inundated with this junk. For the life of me I can't figure out where this is configured for each domain.  Further turn on  NDR's for incorrectly formatted SMTP addresses so that senders would know the message did not reach their intended recipient.     I'm guessing that the first option won't be possible in my version of Imail, but option two is probably beyond simple and I'm just missing it.  If I can provide any further information or clarification I'd be happy to.   Thanks folks,   Mike Kemmerrer Pro-2-Call Network Consulting, LLC San Jose, CA [EMAIL PROTECTED]   Typical specs of the Imail Servers we are administering:   Windows 2000 Sp4 Imail version  7.15 2003.03.11.7